High hydrogen response polyolefin catalyst component and preparation method thereof, and olefin polymerization method

An olefin polymerization and sensitive technology, applied in the field of olefin polymerization, can solve problems such as narrow molecular weight distribution and poor processability of polymers

Inactive Publication Date: 2012-12-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] A large number of patent literature reports prove that the use of diether compounds can well adjust the hydrogen tuning sensitivity of the catalyst, but the sin

Method used

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  • High hydrogen response polyolefin catalyst component and preparation method thereof, and olefin polymerization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In the normal-pressure reaction kettle repeatedly replaced by high-purity nitrogen, 4.8 grams of anhydrous magnesium chloride, 70 milliliters of toluene, 4.0 milliliters of epichlorohydrin, 12.5 milliliters of tributyl phosphate and 2.0 milliliters of tetraethoxysilane were added successively. Under the condition of 60 DEG C, reacted for 1 hour, added 1.4 grams of phthalic anhydride and 30 milliliters of toluene, continued to react for one hour, cooled to -28 DEG C, added dropwise 56 milliliters of titanium tetrachloride (drop speed 5 milliliters / min ), gradually warming up to 85°C (heating rate is 5°C / min), constant temperature for one hour, filtering, washing twice with toluene, then adding 48 ml of titanium tetrachloride, 72 ml of toluene, and then adding 2-isopropyl- 2-isoamyl-1,3-dimethoxypropane 2mL, kept at 110°C for 0.5 hours, filtered, then added 48ml of titanium tetrachloride, 72ml of toluene, treated once at 110°C for 0.5 hours, then filtered , the obtained s...

experiment Embodiment 1

[0049] After 5 liters of stainless steel autoclaves were fully replaced with nitrogen, 5 milliliters of concentrations were added to be a hexane solution of 0.5 mol / liter of triethylaluminum and 1 milliliter of concentrations to be 1 mol / liter of methylcyclohexyldimethoxysilane ( CMMS) hexane solution and 10 mg of catalyst prepared in Example 1, then add 10 milliliters of hexane to flush the feed line, then add 1 liter (under standard state) hydrogen, and 2 liters of refined propylene, and heat up to 70 ° C. Polymerization was carried out at temperature for 1 hour. After the reaction, the temperature of the reactor was lowered and the stirring was stopped to discharge the reaction product to obtain an olefin polymer. See Table 1 for details of the results.

experiment Embodiment 2

[0051] After 5 liters of stainless steel autoclaves were fully replaced with nitrogen, 5 milliliters of concentrations were added to be a hexane solution of 0.5 mol / liter of triethylaluminum and 1 milliliter of concentrations to be 1 mol / liter of methylcyclohexyldimethoxysilane ( CMMS) hexane solution and 10 mg of catalyst prepared in Example 1, then add 10 milliliters of hexane to rinse the feed line, then add 4 liters (under standard state) of hydrogen, and 2 liters of refined propylene, and heat up to 70 ° C. Polymerization was carried out at temperature for 1 hour. After the reaction, the temperature of the reactor was lowered and the stirring was stopped to discharge the reaction product to obtain an olefin polymer. See Table 1 for details of the results.

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Abstract

The present invention relates to a high hydrogen response olefin polymerization catalyst component and a preparation method thereof, and an olefin polymerization method. According to the present invention, an organic silane compound and a diether internal electron donor compound are simultaneously introduced during a catalyst component preparation process, and the prepared catalyst component is used for polymerization, particularly for propylene polymerization, such that the hydrogen regulation performance of the catalyst system is increased, the particle morphology of the polymer is improved, and the original isotacticity and other high excellent performances of the catalyst system can be well maintained. In addition, the method of the present invention is suitable for a slurry polymerization method, a bulk polymerization method, a gas phase method, and a plurality of polymerization processes.

Description

technical field [0001] The invention relates to an olefin polymerization catalyst component with high hydrogen modulation sensitivity, a preparation method thereof and an olefin polymerization method. technical background [0002] The current conventional method for preparing highly active supported catalysts in the field of olefin polymerization is the co-precipitation method. First, magnesium halide is dissolved in a solvent system to form a uniform solution, and then the active magnesium halide is precipitated with titanium halide, and at the same time the titanium active group Share the load. Patent CN85100997A discloses a catalyst system for olefin polymerization and copolymerization, which catalyst system includes: (a) Ti-containing solid catalyst component, (b) alkylaluminum compound, (c) organosilicon, wherein (a) ) component is formed by dissolving magnesium halide in organic epoxy compound and organic phosphorus compound to form a homogeneous solution. Next, a so...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F4/646C08F4/658C08F4/651C08F110/06C08F210/16
Inventor 付梅艳郭正阳王迎王宇任春红刘萃莲雷世龙洪挺
Owner CHINA PETROLEUM & CHEM CORP
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